I've had credit cards that had numbers changed due to the store-wide hacks we've all heard about. Usually, the impact is that I need to update my auto-payments to the few I have on file.
I purchased tickets to an event, months ago, for a September date, upcoming. The receipt specifically stated "this is not a ticket, you must present the credit card you used to purchase the ticket the night of the event."
Now that the account number has changed, do I present the original card, as the magnetic strip will still have the old number, or will the system 'know' the new card has replaced it? This is the first I've run into this, I usually have a printed ticket, or when a card is needed, it's a movie that I paid a few days prior to the show, no time for a number swap to occur.
Update - Entrance to the show went without a hitch. Obviously (in hindsight) the strip still contained the data to show as it was the card used to purchase he ticket. And the agent wouldn't see anything else.